Skinny girls working out

I'm 5'3" and weigh 95-100lbs and I'm constantly struggling to stay above underweight. And I know there are other girls with the same difficulty. My question is, how do I get fit without losing any or too much weight? I just want to be healthy and active with a nice toned look. Any food or work out suggestions that I should try?

When you say "underweight," are you speaking of some chart of averages or something your doctor told you? If you are worried about being underweight and haven't talked to your doctor, you should. Underweight is different for everyone. My mother was not much shirter than you and only weighed 90 lbs until she had 3 kids but she was not underweight.

I'm definitely a petite person so underweight is a little more steep for me, but I am going off of information from my doctor. I have a thyroid disease and weight loss has been a big problem for me my whole life.

Working out wont make you lose weight, it makes you lose fat - ad gained muscle. This could actually result in weight GAIN. Work with weights, avoid cardio. When you're more comfortable move up to heavier weights.

Hi I know what you mean but if you eat enough to compensate for your exercise then weight loss should not be a problem,also try higher calorific foods to give you energy for your workout but to also ease weight loss. However if this does not work for you I would recommend seeing a dietician and asking them about the correct diets for weight maintenance(but also to keep fit and healthy and keep up a moderate standard of exercise to your best ability.) :) I hope this helped a little.

If you want to gain some weight there is only one solution, start eating more . And as mentioned use weights as your main training. Since muscle mass is heavy to build the body needs more energy than usual. Lets say you are eating arround 1800kcal and this is the lowest what your body needs( all hypothetical). If you want ur body to have energy to build muscle you will have to eat more and get more kcal in ur system! Good weight training wont be as effective when you dont eat accordingly.

If you still want to do some cardio you have to compensate with eating even more ;)